8F Materials and Recycling Revision

8F Materials and Recycling Revision

8Fa The material world

• Thousands of years ago people only knew about a few metals like gold and silver

• Perople started using hotter fires to produce different metals like copper and iron.

• Chemicals that could not be split into anything simpler were called elements.

Fill in the Blanks

Fill in the Blanks

Multiple Select

Which of these substances are elements? (Pick 2)

• Copper

• Glass

• Sand

• Aluminium

8Fb Elementary

• Elements are simple substances made up of only one type of atom

• Atoms are the smallest particle you can get without a nuclear reaction

• There are currently 118 different elements that have been discovered.

• Each is shown on the Periodic Table using chemical symbols

Multiple Choice

Aluminium

• Al

• Ag

• Ar

• Au

Multiple Choice

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

Multiple Choice

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

• element

• subatomic particle

• electron

• matter

Multiple Choice

Which of the following atomic symbols for bromine is written correctly?

• bR
• BR
• Br
• br

Multiple Choice

Which of the following is a pure substance?

• O₂
• Al₂CO₅
• C₆H₁₂O₆
• SiO₂

Multiple Choice

How many different elements are in this chemical formula: C₂H₂ClK₃

• 6
• 8
• 2
• 4

Multiple Choice

CARBON

• C
• Ca
• Cl
• Cu

Multiple Choice

CHLORINE

• C
• Ca
• Cl
• Cu

Multiple Choice

What do we know about atoms now that we didn't know 500 years ago?

• Atoms are actually square

• Atoms are made of smaller particles called protons, neutrons and electrons

• Substnces are all made up of either atoms or molecules

8Fc Metal Detecting

• Metals are usually: Shiny, Flexible, Good electrical and heat conductors, and solids at room temperature with high melting points

• Non-Metals are often: Gases or solids that melt very easily, good heat and electrical insulators, brittle.

Multiple Choice

Why is there always a plastic or rubber covering on wires for things that we plug in to electrical outlets?

• because the wire is made of metal and metals conduct electricity, so it would shock you

• to cover up the luster of the metal that the wire is made from

• to make sure it doesn't attract to a magnet

• so it won't get bent

Multiple Select

Which properties of metal makes it a good choice to make a cooking pot out of? Choose TWO

• it has luster - it is shiny

• it is a good conductor of heat

• it is ductile - able to be made into a wire

• it has a high melting point

Multiple Choice

Allows heat or electricity to go through

• insulator

• conductor

• luster

• ductile

Multiple Choice

Most __________ conduct electricity very well.

• types of glass
• plastics
• metals
• types of rubber

Multiple Choice

 Which of the following does not conduct electricity easily?

• copper
• plastic
• silver
• salt water

Multiple Choice

Shiny

• Metal
• Nonmetal

Multiple Choice

Sulfur

• Metal
• Nonmetal

Multiple Choice

Which of the following is NOT a characteristic of most metals?

• Brittle
• Good conductor
• Ductile
• Malleable

8Fd Compound Interest

• A compound is formed from two or more elements chemically joined together

• The smallest particle of a compound is called a molecule

• We can show the number of atoms of each element in a molecule using a chemical formula.

• Sometimes the formula shows the ratio of elements in a compound. For example the formula for Polythene is CH₂

Multiple Choice

A chemical change always results in the formation of a:

• explosion
• big mess
• new substance
• new state of matter

Multiple Choice

A compound consists of two or more elements bound together.

• True
• False

Multiple Choice

Water (H₂O) freezing is an example of:

• A chemical change
• A physical change

Multiple Choice

Does this picture show a compound?

• No
• Yes

Multiple Choice

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Multiple Choice

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

8Fd Compound Interest 2

• When we name compounds made from a metal and a non-metal, we put the metal first, then add 'ide' to the end of the other element

• For Example Magnesium + Oxygen = Magnesium Oxide

• The properties of a compound are usually very different to the properties of the elements that make it.

• If something reacts with oxygen it will get heavier

Multiple Choice

Name the following compound:

CO₂

• monocarbon dioxide

• carbon oxide

• carbon dioxide

• oxygen carbonide

Multiple Choice

Name the ionic compound, LiCl

• lithium chlorine

• lithium chloride

• lithium chlorate

• lithium monochloride

Multiple Choice

What is the formula for Sodium Bromide? 

• NaBr
• NaBr₂
• Na₂Br
• Na₃Br

Multiple Choice

What is the name of K₂O?

• dipotassium monoxide
• dipotassium oxygen
• Potassium oxide
• Potassium oxygen

Multiple Choice

If Iron reacts with oxygen to form rust, what is true about the mass of the rust?

• The rust is heavier than the iron

• The iron is heavier than the rust

• The iron is the same mass as the rust

8Fe Re-use, renew and Recycle

• Recycling takes materials from a substance and turns them into something new

• Re-using is taking the same thing and using it again for a similar purpose. Like reusing a plastic bottle by filling it from your tap

• Resources are renewable if they can be replaced at the same rate they are used. For example paper can be sustainable if we plant more trees to replace the ones cut down

Multiple Choice

Is it recyclable?

• Yes

• No

Multiple Choice

Is it recyclable?

• Yes

• No

Multiple Choice

Is it recyclable?

• Yes

• No

Multiple Choice

Is it recyclable?

• Yes

• No

Multiple Choice

Which statement is not an advantage of Recycling?

• Reduces greenhouse gases

• Reduces groundwater contamination

• Factories and machinery must be provided

• Natural resources will last longer

Multiple Choice

Identify if the statement refers to Recycling or Reusing: "We can hardly identify the original material the product is made out of"

• REUSING

• RECYCLING

Multiple Choice

Identify if the statement refers to Recycling or Reusing: "There is no chemical process used to create the product"

• REUSING

• RECYCLING